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Calgary City Police investigate the crime scene at home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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A man and a woman talk to police outside a home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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A man and a woman talk to police outside a home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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A man and a woman talk to police outside a home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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A woman wipes blood off of her hands as she talks to police outside a home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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Calgary City Police take these two elderly people from the crime scene at home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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Calgary City Police take these two elderly people from the crime scene at home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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Calgary City Police take these two elderly people from the crime scene at home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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Police canine unit walks outside a home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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Calgary City Police investigate the crime scene at home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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Calgary City Police investigate the crime scene at home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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Police take a young child to their car from a home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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Police take a young child to their car from a home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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A police officer scratches his head outside a home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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A police officer and paramedics prepare to unload the suspect of a stabbing incident from this ambulance at the South Calgary Health Centre in SE Calgary, Alta. The suspect was caught in south Calgary after fleeing from a home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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A police officer and paramedics prepare to unload the suspect of a stabbing incident from this ambulance at the South Calgary Health Centre in SE Calgary, Alta. The suspect was caught in south Calgary after fleeing from a home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency

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A police officer and paramedics prepare to unload the suspect of a stabbing incident from this ambulance at the South Calgary Health Centre in SE Calgary, Alta. The suspect was caught in south Calgary after fleeing from a home where at least one person is dead and multiple others injured in a stabbing incident on Penbrook Drive in SE Calgary, Alta. on Sunday May 4, 2014. Stuart Dryden/Calgary Sun/QMI Agency